GAS BOILER INCLUDING OUTPUT ADJUSTING DEVICE, AND METHOD OF ADJUSTING OUTPUT OF GAS BOILER

摘要

Provided are a gas boiler including an output adjusting device and a method of adjusting output of gas boiler which may simplify a structure of the output adjusting device for uniformly adjusting a mixture ratio of air and gas for combustion in proportion to an output value of the boiler and may increase a turn-down ratio (TDR) by accurately controlling an output of the boiler by continuously changing the amount of a mixture of the air and the gas for combustion which are supplied even when the output of the boiler is a low output as well as a high output.To this end, the gas boiler including the output adjusting device includes a ventilator, a gas valve, a burner, a combustion chamber, a heat exchanger, and an exhaust gas hood, wherein an inlet of the ventilator is provided with an output adjusting device including: an air inlet through which the external air is supplied to the ventilator; an air adjustment valve that adjusts an amount of the air supplied through the air inlet; a gas outlet through which the gas passing through the gas valve is discharged; a gas adjustment valve that adjusts an amount of the gas for combustion passing through the gas outlet; and a valve driving unit that drives the air adjustment valve and the gas adjustment valve, wherein the air adjustment valve and the gas adjustment valve are integrally formed with each other, a distance between the air adjustment valve and the air inlet and a distance between the gas adjustment valve and the gas outlet are changed equally, and an output of the burner is continuously adjusted by adjusting distances between the air adjustment valve and the gas adjustment valve and between the air inlet and the gas outlet.